Musnad Abu Ya'la al-Mawsili 150:56

Muhammad ibn Abdullah narrated to us, Hashim ibn al-Qasim narrated to us, from Muhammad ibn Muslim ibn Abi al-Waddah, from Hisham ibn Urwah, from his father, from Aisha, who said: "Ask Allah for everything, even the shoelace, for if Allah does not make it easy, it will not be made easy."